If I were a Democrat in the department of Justice and helping in the cover up, I would ask myself the following question. If Obama does not win the next election and Congress is no longer controlled by Democrats what are the odds that I will go to jail for obstruction of justice, and perjury?
I think that is not a problem. Once the Republicans are in charge they will drop the investigations or will let them peter out. Republicans are normally more enthusiastic in covering up Democrat scandals than Democrats are (and, of course, highly enthusiastic about exposing and atoning for Republican scandals). Issa and Grassley are making their colleagues terribly uncomfortable right now. Republicans have always been comfortable with Left Democrat staffing and control of the bureaucracy and, on accession to the presidency, do not weed out the communists, socialists and Democrat thieves in the departments. Your DOJ perps are mostly safe and won’t even lose their jobs after a change in administration. Democrats, on the other hand, do a wholesale housecleaning of the bureaucracy as a first order of business. That is one reason the leftward charge can not be stemmed, only briefly slowed a little.